Well-known doctor floats the idea that Clinton is being poisoned by Putin and Trump

Hillary Clinton is definitely not being poisoned by the Russians. So why is one famous doctor raising the possibility in the first place?

Dr. Bennet Omalu is the forensic pathologist who first published findings about chronic traumatic encephalopathy in football players, sparking a debate about how the NFL handles concussions. His work has been widely lauded, and his story was dramatized in the Will Smith film "Concussion."

Moments on the trail that have some concerned over Hillary Clinton's health:

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Moments on the trail that have some concerned over Hillary Clinton's health

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Moments on the trail that have some concerned over Hillary Clinton's health

Democratic presidential candidate Hillary Clinton holds up a glass of water as she struggles to contain a coughing fit as she speaks at the Jewish Federation of Greater Des Moines while campaigning in Des Moines, Iowa January 25, 2016. REUTERS/Rick Wilking

U.S. Democratic presidential candidate Hillary Clinton leaves ceremonies marking the 15th anniversary of the September 11 attacks at the National 9/11 memorial The Hillary Clinton campaign disclosed she had been diagnosed with pneumonia, after a social media video appeared to show her swaying and her knees buckling as she left the memorial ceremony in New York. REUTERS/Brian Snyder

MANHATTAN, NEW YORK CITY, UNITED STATES - 2016/02/16: Mrs. Clinton interrupted by coughing spasm during her speech. Presidential candidate and former secretary of state Hillary Rodham Clinton spoke at Shomburg Center on her plans for strengthening the Black community and improving opportunity for minorities if elected president. (Photo by Andy Katz/Pacific Press/LightRocket via Getty Images)

CLEVELAND, OH - SEPTEMBER 05: Democratic presidential nominee former Secretary of State Hillary Clinton pauses to take a drink of water to help soothe a cough during a campaign rally at Luke Easter Park on September 5, 2016 in Cleveland, Ohio. Clinton is kicking off a Labor Day campaign swing to Ohio and Iowa on a new campaign plane large enough to accommodate her traveling press corp. (Photo by Justin Sullivan/Getty Images)

SAN FRANCISCO, CA - MAY 26: Cough drops and a microphone sit on a stool for democratic presidential candidate former Secretary of State Hillary Clinton during a campaign event on May 26, 2016 in San Francisco, California. Hillary Clinton is campaigning in the San Francisco Bay Area ahead of California's presidential primary on June 7th. (Photo by Justin Sullivan/Getty Images)

Democratic presidential candidate Hillary Clinton struggles to contain a coughing fit as she speaks at the Jewish Federation of Greater Des Moines while campaigning in Des Moines, Iowa January 25, 2016. REUTERS/Rick Wilking

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His latest expose is somewhat less plausible. After Clinton stumbled while leaving a 9/11 ceremony, Omalu speculated she might've been poisoned. He then pointed fingers at Donald Trump and Vladimir Putin, saying "with those two all things are possible."

By speculating on Clinton's health from afar, Omalu joins a long line of physicians who've injected their perspective on how physically and mentally fit the candidates are without ever examining them.

During a CNN panel, Dr. Tiffany Sizemore said: "The medical problems that Hillary had in 2012 are still significant medical problems. Having a blood clot in a vein in your brain is a pretty significant issue."

RELATED: Clinton isn't the first politician with health issues

And while discussing Trump's mental health, Dr. Gail Saltz told CNN: "It certainly makes you think about intense narcissism, right? Everything has to refer to me, and I have to be the best."

The speculation got so bad early on in the campaign that the American Psychiatric Association published a sharp rebuke of psychiatrists who were breaking the unwritten Goldwater Rule of politics: Never publicly psychoanalyze a candidate you haven't formally examined.

To tamp down the speculation, Clinton's doctor recently released an updated summary of the candidate's health. That note, which included bloodwork results, didn't mention anything about poisons, Russian or otherwise.